Upgrade to Rails 4

closes #4
Move fontawesome fix

During asset compilation, the environment isn't required. Move fontawesome
requires into application.rb so they're picked up.
Merge branch 'master' into apps_cleanup

Conflicts:
	Gemfile
	Gemfile.lock
	app/controllers/apps_controller.rb
	config/application.rb
	config/environments/production.rb
	config/initializers/secret_token.rb